This was an easy fold for me but I got to thinking, sometimes people do this move with air because they put you on KQ-AK and assume a missed flop. So there could be some situations where we are ahead with the Ace high.

PokerStars No-Limit Hold'em, $0.10 BB (8 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

UTG ($8.45)
UTG+1 ($3.40)
MP1 ($11.70)
MP2 ($2)
CO ($16.70)
Hero (Button) ($6.65)
SB ($2.40)
BB ($9.95)

Preflop: Hero is Button with K, A
1 fold, UTG+1 calls $0.10, 3 folds, Hero bets $0.50, 2 folds, UTG+1 calls $0.40

Flop: ($1.15) J, 7, 5 (2 players)
UTG+1 checks, Hero bets $0.60, UTG+1 raises to $2.90 (All-In), Hero folds

Total pot: $2.35 | Rake: $0.10

No real reads on the villain as I wasn't at the table long but the hand prior to this one I had AKs in the CO and 3 bet it vs this same villain and he called - he showed down AQo (and won because he hit a Q on the turn giving him 2 pair). And prior to this I saw him play some really crappy hands in bad positions.