I shall include more details next time, but since I was posting this as I was playing I made it a quick post.
I didn't mention suits since that was no issue here, three different suits on the flop.
In retrospect, my fold was to quick, didn't think it through and just folded at the sight of AK on the flop. A call would have been better given the small size of the bet, or maybe even better: a 3-bet representing a big hand?
Thanks for the feedback. Lately I've been focusing more on position and playing ranges, so that I forget about the good old pot odds