I don't have time to + (verb)

The word 'don't' is a contraction of the words 'do not.' When adding 'have time to' you are simply stating that you have other obligations and all other things considered must wait.

Here are some examples:

I don't have time to explain.
I don't have time to diner.
I don't have time to eat.
I don't have time to exercise. 
I don't have time to talk.