What does it mean?
Domino's once promised delivery in 30 minutes or the pizza was free. Here "come" means climax, so it's a joke about lasting 30 minutes or making it up with a second round.
How to use it
Only for a partner or friends who like crude humor, ideally by text. With someone you just met it's way too sexual.
How to reply
Bold of you to advertise a delivery guarantee you clearly can't keep.