10/20 in Windsor. AK flops top pair and faces a river donkbet.

[flytrap]

10/20 NL in Windsor. Villain in this hand is Mike, for those that play in Windsor, he is in his 30s and has a lazy eye. He's a big time fish/calling station. He has like $4500 to start the hand, and I cover. My image is probably pretty tight, as I've been totally card dead. I've also been losing a lot on the night, not sure if that changes his perception of me. On to the hand:

Villain limps EP, 2 limpers, I raise AKo to like $120 from the cutoff. Mike and another limper call. Pot is $400ish.

Flop A64 Rainbow
Check, Check, I bet $300, Villain calls, other guy folds and Mike calls. He's pretty loose, so he could have a lot of hands here. 57, A6, A4, 45, 67, Ax, etc.
Pot is $1000, turn card is 4, putting a second spade up. Villain checks, I bet $600, he calls.
Pot is now $2200, river is T non-spade. Villain donks for $1000. I'm getting 3.2 to 1 to call. Call this?