villain has me outchipped 2-to-1 or 3-to-1

We're heads up.

I have AJo and go all in over his raise (knew he'd raise with anything and he didn't have anything) he calls

He shows A7o

flop is: 3 4 5
turn: 6
river: blank

I leave with $20 and he's leaves with $35 ($5 buyin game)