I speak as someone who has only managed to fold KK once preflop, and who just the other day stacked off like a huge donkey with AK against a nits 3bet, but yeah, sometimes you just gotta fold.

equity win tie pots won pots tied
Hand 0: 22.618% 15.59% 07.03% 11209632 5056266.00 { KK }
Hand 1: 77.382% 70.35% 07.03% 50594604 5056266.00 { KK+ }

Well done for even considering whether this is a fold - I don't think many people at these limits are even capable of giving this any thought.