you gotta fold
1) you have no idea what the guy UTG limped with.
2) you have 2 tight players in the pot. and one of the guys is tight-aggressive, so i'm going to assume if he's got AA he would re-raise just like described in the scenario. he wouldn't slow play AA in this spot and he would recognize the wisdom of taking the pot down right there or isolating someone for an all-in. the tight player who put in the initial raise could easily have AA as well.
3) 3 raises and all you have is a pair of kings? wouldn't you want to wait for a better spot to get your money in? what's the point of saying, 'oh well, if someone has AA then what can you do'? why can't you just recognize that there is a distinct possibility that you're in a tough spot and fold the hand? unless you have some crazy read on your opponents, i say you have to, at the very least, respect the 2 tight players and fold KK.