Lay down Kings preflop?

[TheGrifter]

Foxwoods 1/2 NL 100 max

I'm in the CO with red Kings (Just sat down ~ $125). EP Limper. CO+1 ($600+) opens for 15. I double his bet to 30. SB ($400+) makes it 60. CO+1 moves allin.

I stew for a few minutes, realize I'm probably beat, realize it's very rarely correct to fold KK preflop in a 50BB game and call.

SB Stews for a very long time and eventually calls for 350 more. CO+1 flips over aces, SB flips QQ(!).

I spike a king and take down the main pot, while the aces make profit off the side pot. Does anyone lay down the kings here? This NL game is crazy and I would not have been shocked if both my opponents had flipped over AK. However, I did read them for exactly what they had and called it before they flipped them over.

Anyway, basically it's a short-stack NL question in a loose aggro game, is it correct to fold kings in my position?