You are probably tired of hearing this; always cap kings. Do not worry about aces at this point because there are many hands that play this way that are not AA. Don't worry about an ace on the flop. the probability that no over-card to your KK will come on the flop is better than 77% and by the river it is 55% (I know, it seems more than that but I got this
here) . You are playing weak/tight and will have to work your way out of that.
This isn't that obvious of a flop fold. You are getting 16:1 and are closing the action. The odds of you turning a king are 22.5:1 so you would need another 3.5 BB of implied odds on the big streets. You also have to consider that you are ahead here about 10% of the time.