You have to call down here IMO. First of all you usually have 8 outs if someone has two pair (here 2K's, 3Q's, 3 3's). Secondly, particularly at these limits people are going to c/r with hands that you beat often enough to make it profitable to call down.

EDIT: As everyone is saying, you should ALWAYS be raising this preflop. For the rest of your poker career. Every time!