Retrieve only those users that haven't been updated lately from the DB

Pulling every user is going to be a painful table scan, plus a sort by an unindexed column, means this query is not going to scale well. So we have the DB filter what users are returned!
Bah! Must be my day job; I work with a lot of classes that end in the word "Ad".

Easy to change the query though. I'd tried to mimic the ORDER BY clause. I'll tweak the index to be {deactivatedAt,updatedAt} as well; IS NULL is nice and selective for the front of that index.