I don't think it's possible to be conscious and have no thoughts at the same time. Otherwise, you wouldn't even remember the experience.
I think we first need to define what we mean by "thoughts".
It’s not about having no thoughts. It’s about not being involved in the thought occurring. We often identify with our thoughts and feelings in a way that we do not when we see a cloud pass by. Treat those thoughts, feelings and physical sensations in the same way during meditation.