Unless you either have a fever or are under covers while handling, you are not going to radiate enough body heat to cause a health condition in your snake. Most likely if you are handling the snake it will be moving or resting on clothes which will further reduce body heat.
Remember we are 98.6 give or take on the inside, not the surface.
The more concerning aspect would be over handling a ball python. There is no reason to handle a ball python for longer than say 30 minutes at a time. Doing so can increase stress levels.