nl10: my AK cbet is minraised on a low flop

[gedanken]

I'm playing really tight, 10/10/i, but villain has only been at the table about 20 hands. He's showing some laggish tendencies, but I didn't note his stats at the time:


PokerStars No-Limit Hold'em, $0.10 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

SB ($28.75)
BB ($1.90)
Hero ($25.30)
MP ($6.65)
Button ($13.25)

Preflop: Hero is UTG with A[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/heart.gif[/img].
<font color="#CC3333">Hero raises to $0.4</font>, MP calls $0.40, <font color="#666666">1 fold</font>, SB calls $0.35, BB calls $0.30.

Flop: ($1.60) 3[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/spade.gif[/img], 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, BB checks, <font color="#CC3333">Hero bets $1.25</font>, <font color="#CC3333">MP raises to $3</font>, SB folds, BB folds, Hero ???

Little chance to improve, and I'll never know where I stand if he keeps betting, so I'm inclined to fold, even though I might have the best hand.

Do I even cbet here in the first place?