Folding KK

[Drewboy22]

6-handed SNG Pokerstars ($35 +3) 5 left.

Blinds are 50-100.
Chip Counts:

SB 2200
BB (me) 1700
UTG 1500
CO 1700
Button 2400

I'm dealt KK.

UTG limps
CO limps
Button raises All-in.
SB quickly calls.

My reads on both Button and SB so far is that they are pretty tight. I am sure one of them has AA so I fold. I kept thinking about Sklansky's chapter on folding KK early in a tournament. I also felt that I was one of the better players at the table and did not want to get busted out on a coin flip.
Any comments would be appreciated.

I'll post results later.