If the temp feels too hot to you, then it is absolutely too hot for your snake. Good call on your part. Human temp is pretty hot already so when something feels hot to us, its usually higher than us.
I'm glad you were able to get a thermostat. They are essential to any reptile keeping.
All of the commercial UTHs by the big names like Zoomed or Zilla can all get up to 130 even though they said it only goes to ~95.
But they can run safely when hooked up to a thermostat.