How would you approach this flop, and do you lay this down?
Villian 31/6/1.3 over small sample size of 35 hands

Ultimate Bet No-Limit Hold'em, $1 BB (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

saw flop|saw showdown

Button ($104.15)
SB ($71.95)
BB ($94)
UTG ($60.50)
UTG+1 ($108.45)
UTG+2 ($52)
MP1 ($100.65)
MP2 ($174.20)
Hero ($112.60)
CO ($101.75)

Preflop: Hero is MP3 with A, K.
1 fold, UTG+1 raises to $2, 2 folds, MP2 calls $2, Hero raises to $9.5, CO calls $9.50, 3 folds, UTG+1 calls $7.50, MP2 folds.

Flop: ($32) A, J, K (3 players)
UTG+1 checks, Hero bets $20, CO raises all-in