CREATE TABLE table_name_2 (date INTEGER, label VARCHAR(255), catalog VARCHAR(255), format VARCHAR(255))
what is the earliest date for the album that had a catalog number of 3645, was formatted as a cd and was under the luaka bop label?
    
SQL: SELECT MIN(date) FROM table_name_2 WHERE catalog = "3645" AND format = "cd" AND label = "luaka bop"