NL25: AK cbet?

[dj_inter]

PokerStars No-Limit Hold'em, $0.25 BB (5 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

saw flop

Button ($11.55)
SB ($20.25)
BB ($12)
UTG ($27.75)
Hero (MP) ($60.55)

Preflop: Hero is MP with A, K
1 fold, Hero bets $1, Button calls $1, SB calls $0.90, 1 fold

Flop: ($3.25) 6, 4, 8 (3 players)
SB checks, Hero?

BU 29/20/14, SB 41/28/4. cbet?