How easy should this fold be

This is the 2nd hand, no reads. When they both called my raise, I said to myself, be careful of K or Q (thinking there was a chance one of them had pocket K or Q, then I got myself in this mess.

Ultimate Bet No-Limit Hold'em Tourney, Big Blind is t20 (10 handed) converter

UTG+1 (t1500)
UTG+2 (t1670)
MP1 (t1460)
Hero (t1500)
MP3 (t1460)
CO (t1460)
Button (t1490)
SB (t1460)
BB (t1500)
UTG (t1500)

Preflop: Hero is MP2 with A[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/club.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">MP1 raises to t70</font>, <font color="#CC3333">Hero raises to t240</font>, <font color="#666666">2 folds</font>, Button calls t240, <font color="#666666">2 folds</font>, MP1 calls t170.

Flop: (t750) 5[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
MP1 checks, <font color="#CC3333">Hero bets t750</font>, <font color="#CC3333">Button bets t1250 all-in</font>, <font color="#CC3333">MP1 calls</font>, Hero ?????