AK hits top pair on scary board

[Sorcerer808]

Villain is 31.5/6/0.9. Given his passiveness and the scary board, is this standard?

Party Poker No-Limit Hold'em, $1 BB (5 handed) Hand History converter Courtesy of PokerZion.com

Button ($22.70)
SB ($109.85)
BB ($206.55)
UTG ($37.35)
Hero ($126.95)

Preflop: Hero is MP with A[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/diamond.gif[/img].
UTG calls $1, <font color="#CC3333">Hero raises to $5</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">SB raises to $15</font>, <font color="#666666">1 fold</font>, UTG folds, Hero calls $10.

Flop: ($32) T[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, Hero checks.

Turn: ($32) 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets $15</font>, Hero calls $15.

River: ($62) Q[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets $40</font>, Hero folds.

Final Pot: $102