What is the ruling on laughter that could be considered mockery of religion due to thinking about delaying prayer?

The questioner is suffering from obsessive thoughts (waswasah) regarding laughter and mockery. The cure for this is to strive against these thoughts by cutting them off and ignoring them, because waswasah is a severe illness, and indulging in it leads one into confusion, doubt, and distress. The situations mentioned by the questioner are not considered mockery of religion; rather, they are effects of waswasah. This has been detailed in previous fatwas.