Layed down KK on flop QJ6

[lange101]

Table '9361327 91' Seat #2 is the button
Seat 1: Villain (2260 in chips)
Seat 2: (3080 in chips)
Seat 3: (510 in chips) is sitting out
Seat 4: Hero (5940 in chips)
Seat 5: (3120 in chips)
Seat 6: (8113 in chips)
Seat 7: (4985 in chips)
Seat 8: (2005 in chips)
Seat 9: (477 in chips)

*** HOLE CARDS ***
Dealt to Hero [Kc Ks]
Folds to CO who raises to 250. Hero calls from the BB.
*** FLOP *** [Jh 6c Qd]
Hero bets 300
Villain raises 1710 to 2010 and is all-in
Hero folds

Villain collected 1175 from pot

I know this is not small stakes poker but I wasn't sure where to post it. ANyway, response would be welcome. I feel this was a really tight lay down. Preflop, my range of hands for the villain was JJ-AA, AK, or AQ because it was a larger bet than he has done before. if he has AA, JJ, or QQ i'm done, if he has AK and AQ i'm ahead. Is this just an absurdly tight fold?