[25NL] 54s flop decision

[Obliky]

PokerStars No-Limit Hold'em, $0.25 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

CO ($50.70)
Button ($12.25)
SB ($24.75)
Hero ($35)
UTG ($30.85)
MP ($5.50)

Preflop: Hero is BB with 4[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/spade.gif[/img].
UTG calls $0.25, <font color="#CC3333">MP raises to $1</font>, CO calls $1, Button calls $1, <font color="#666666">1 fold</font>, Hero calls $0.75, UTG folds.

Flop: ($4.35) 5[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
Hero checks, <font color="#CC3333">MP bets $1</font>, CO folds, Button calls $1, Hero ??

MP is slightly loose both pre and post flop.
Button is fishy.

Do we have the implied odds to continue here?