Basic sng question

[Toro]

Forgive me if this has been asked and answered a thousand times. This situation ties me up in knots every time it happens and maybe it's as simple as pushing the fold button but I got to ask.

Situation: One table $30 sng, blinds 25/50, MP1 who is big stack with 3500 limps, I'm MP2(1350 chips) with KK and I make 200 to go. Everyone fold and MP2 calls.

Pot: 475

Flop: A94 rainbow

MP2 leads with 250 bet

Damn, I hate giving this guy the pot if he has 66 or 77. In this particular hand, I put the guy on a small pair or a raggedy ace. I thought if he had a rag Ace I could make him fold to an all-in raise. He insta called me with A7.

So, in the future, just fold and move on to next hand? Call, see what he does on the turn and fold to another bet? What? Sorry for such a basic one, but this one always [censored] me up.