Document:

Exhibit 4.1

 

NUMBER UNITS

U-____________

 

SEE REVERSE FOR CERTAIN DEFINITIONS

 

CUSIP G5260A 138

 

KEYARCH ACQUISITION CORPORATION

UNITS CONSISTING OF ONE CLASS A ORDINARY SHARE, ONE-HALF OF ONE

REDEEMABLE WARRANT AND ONE RIGHT

 

	THIS CERTIFIES THAT	is the owner of	Units.

 

Each Unit (“Unit”) of
Keyarch Acquisition Corporation, Cayman Islands exempt company (the “Company”) consists of one (1) Class
A ordinary share, par value $0.0001 per share (“Ordinary Share”), one-half (1/2) of one redeemable warrant (each
whole warrant, a “Warrant”) and one (1) right (“Right”). Each whole Warrant entitles
the holder to purchase one (1) Ordinary Share (subject to adjustment) for $11.50 per share (subject to adjustment). Only whole warrants
are exercisable. Each Warrant will become exercisable thirty (30) days after the Company’s completion of a merger, capital
stock exchange, asset acquisition, stock purchase, reorganization or other similar business combination with one or more businesses (each
a “Business Combination”) and will expire unless exercised before 5:00 p.m., New York City Time, on
the date that is five (5) years after the date on which the Company completes its initial Business Combination, or earlier upon redemption
or liquidation. Each Right entitles the holder to receive one-tenth (1/10) of one Ordinary Share upon the Company’s completion of
a Business Combination. The Ordinary Shares, Warrants and Rights comprising the Units represented by this certificate are not transferable
separately prior to the 90th day following the date of the Company’s registration statement on Form S-1, File No. 333-261500,
unless EarlyBirdCapital, Inc. elects to allow earlier separate trading, subject to the Company’s filing of a Current Report on Form 8-K
with the Securities and Exchange Commission containing an audited balance sheet reflecting the Company’s receipt of the gross proceeds
of the offering and issuing of a press release announcing when separate trading will begin. The terms of the Warrants and Rights are governed
by a Warrant Agreement dated as of        ,            , and a Rights Agreement dated as of            ,                , between the Continental Stock Transfer &
Trust Company, as Warrant Agent and Right Agent, respectively, and are subject to the terms and provisions contained therein, all of which
terms and provisions the holder of this certificate consents to by acceptance hereof. Copies of the Warrant Agreement and the Rights Agreement
are on file at the office of the Warrant Agent and Right Agent at 1 State Street, 30th Floor, New York, New York 10004, and are available
to any Warrant holder and Right holder on written request and without cost.

 

This certificate is not valid unless countersigned
by the Transfer Agent and Registrar of the Company.

 

This certificate shall be governed by and construed
in accordance with the internal laws of the Cayman Islands.

 

Witness the facsimile signature of its duly authorized
officers.

 

     

     

    

 

	Chief Financial Officer	 	Chief Executive Officer
	 	 	 
	 	 	 

 

KEYARCH ACQUISITION
CORPORATION

 

The Company will furnish without charge to each
unitholder who so requests, a statement of the powers, designations, preferences and relative, participating, optional or other special
rights of each class of shares or series thereof of the Company and the qualifications, limitations, or restrictions of such preferences
and/or rights.

 

The following abbreviations, when used in the inscription
on the face of this certificate, shall be construed as though they were written out in full according to applicable laws or regulations:

 

	TEN COM — as tenants in common	UNIF GIFT 

MIN ACT	 
	 	 	 	Custodian	 
	 	 	(Cust)	 	(Minor)
	TEN ENT — as tenants by the entireties	 	 	 
	 	 	Under Uniform Gifts to Minors Act
	JT TEN — as joint tenants with right of survivorship and not as tenants in common	 	 	 
	 	 	 	(State)

 

Additional abbreviations may also be used though
not in the above list.

  

For value received, hereby sell, assign and transfer unto

 

	PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE	 
	 	 
	 	 
	 	 
	(PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE):
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 

 

     

     

    

 

________ Units represented by the within Certificate, and do hereby
irrevocably constitute and appoint ____________________________ Attorney to transfer the said Units on the books of the within named
Company with full power of substitution in the premises.

 

Dated: ___________________________

 

Notice: The signature to this assignment must correspond with
the name as written upon the face of the certificate in every particular, without alteration or enlargement or any change whatever.

 

Signature(s) Guaranteed:

	 	 

 

THE SIGNATURE(S) MUST BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION
(BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM,
PURSUANT TO S.E.C. RULE 17Ad-15 (OR ANY SUCCESSOR RULE UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED).

 

The holder(s) of this certificate shall be entitled to receive a pro-rata
portion of certain funds held in the trust account established in connection with the Company’s initial public offering with respect
to the Class A ordinary shares underlying this certificate only upon the earliest to occur of: (1) the completion of the Business Combination,
and then only in connection with those Ordinary Shares that such shareholder properly elected to redeem, subject to the limitations described
in the Company's final prospectus, (2) the redemption of any public shares properly submitted in connection with a shareholder vote to
amend the Company's amended and restated memorandum and articles of association (A) to modify the substance or timing of the Company's
obligation to redeem 100% of its public shares if the Company does not complete its Business Combination within 18 months from the closing
of its initial public offering or (B) with respect to any other provision relating to shareholders’ rights or pre-initial business
combination activity, (3) the redemption of the Company's public shares if it is unable to complete its Business Combination within 18
months from the closing of its initial public offering, subject to applicable law and as further described in the Company's final prospectus
or (4) if the holder(s) seek(s) to redeem for cash his, her or its respective Ordinary Shares in connection with a tender offer (or
proxy solicitation, solely in the event the Company seeks shareholder approval of the proposed initial business combination) setting forth
the details of a proposed initial business combination, in each case, as more fully described in the Company’s final prospectus
dated       , 2022. In no other circumstances shall the holder(s) have any right or interest of any kind in or to the trust account.Exhibit 4.2

 

	NUMBER	SHARES

 

SEE REVERSE FOR

CERTAIN DEFINITIONS

 

CUSIP G5260A 104

 

SPECIMEN CLASS A
ORDINARY SHARE CERTIFICATE

 

Keyarch Acquisition Corporation

INCORPORATED UNDER THE LAWS OF THE CAYMAN ISLANDS

CLASS A ORDINARY SHARES

 

This Certifies that ___________________________is
the owner of _______________

 

FULLY PAID AND NON-ASSESSABLE
CLASS A ORDINARY SHARES, PAR VALUE US$0.0001 PER SHARE, OF Keyarch Acquisition Corporation
(THE “COMPANY”) subject to the Company’s amended and restated memorandum and articles of association, as the same may
be amended from time to time, and transferable on the books of the Company in person or by duly authorized attorney upon surrender of
this certificate properly endorsed.

 

The Company will be forced
to redeem all of its Class A ordinary shares if it is unable to complete a business combination within the period set forth in the
Company’s amended and restated memorandum and articles of association, as the same may be amended from time to time, all as more
fully described in the Company’s final prospectus dated             , 2022.

 

This certificate is not valid
unless countersigned by the Transfer Agent and registered by the Registrar.

 

Witness the facsimile signatures
of its duly authorized officers.

 

Dated: _____________

 

	Chief Executive Officer	 	Chief Financial Officer
		 	

 

 

 

     

     

    

 

Keyarch Acquisition
Corporation

 

The Company will furnish without charge to each
shareholder who so requests the powers, designations, preferences and relative, participating, optional or other special rights of each
class of shares or series thereof of the Company and the qualifications, limitations, or restrictions of such preferences and/or rights.
This certificate and the shares represented thereby are issued and shall be held subject to all the provisions of the Company’s
amended and restated memorandum and articles of association, as the same may be amended from time to time, and resolutions of the Board
of Directors providing for the issue of Class A ordinary shares (copies of which may be obtained from the secretary of the Company),
to all of which the holder of this certificate by acceptance hereof assents.

 

The following abbreviations, when used in the
inscription on the face of this certificate, shall be construed as though they were written out in full according to applicable laws or
regulations:

 

	 	 	 	UNIF GIFT MIN 

ACT	—     Custodian
	TEN COM	—	as tenants in common	 		    	
	TEN ENT	—	as tenants by the entireties	 	(Cust)	 	(Minor)
	JT TEN	—	as joint tenants with right of survivorship and not as tenants in common	 	under Uniform Gifts to Minors Act
	 	 	 	 	
	 	 	 	 	(State)

 

 

Additional abbreviations may also be used though
not in the above list.

 

For value received, ________________________
hereby sells, assigns, and transfers unto

 

 

(PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING
NUMBER(S) OF

 ASSIGNEE(S))

 

 

(PLEASE PRINT OR TYPEWRITE NAME(S) AND ADDRESS(ES),
INCLUDING ZIP 

CODE, OF ASSIGNEE(S))

 

 

Class A ordinary shares represented by the within
Certificate, and does hereby irrevocably constitute and appoint

 

 

Attorney to transfer the said shares on the books
of the within named Company with full power of substitution in the premises.

 

    2 

     

    

 

Dated: __________

 

	 	
	 	Shareholder

 

NOTICE: THE SIGNATURE(S) TO THIS ASSIGNMENT MUST
CORRESPOND WITH THE NAME AS WRITTEN UPON THE FACE OF THE CERTIFICATE IN EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT OR ANY CHANGE
WHATEVER.

 

	Signature(s) Guaranteed:
	By:
	 
	
	 
	

 

THE SIGNATURE(S) MUST BE GUARANTEED BY AN ELIGIBLE
GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE
MEDALLION PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15 UNDER THE U.S. SECURITIES EXCHANGE ACT OF 1934, AS AMENDED (OR ANY SUCCESSOR RULE)).

 

The holder(s) of this certificate shall be entitled to receive a pro-rata portion of certain funds
held in the trust account established in connection with its initial public offering only upon the earliest to occur of: (1) the completion
of the Company's initial business combination, and then only in connection with those Class A ordinary shares that such shareholder properly
elected to redeem, subject to the limitations described in the Company's final prospectus, (2) the redemption of any public shares properly
submitted in connection with a shareholder vote to amend the Company's amended and restated memorandum and articles of association (A)
to modify the substance or timing of the Company's obligation to redeem 100% of its public shares if the Company does not complete its
initial business combination within 18 months from the closing of its initial public offering or (B) with respect to any other provision
relating to shareholders’ rights or pre-initial business combination activity, (3) the redemption of the Company's public shares
if it is unable to complete its initial business combination within 18 months from the closing of its initial public offering, subject
to applicable law and as further described in the Company's final prospectus or (4) if the holder(s) seek(s) to redeem for cash his, her
or its respective Class A ordinary shares in connection with a tender offer (or proxy solicitation, solely in the event the Company
seeks shareholder approval of the proposed initial business combination) setting forth the details of a proposed initial business combination, in each case, as more fully described in the Company’s
final prospectus dated                , 2022. In no other circumstances shall the holder(s) have any right or interest of any kind in or to the trust
account.

 

    3

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