Are pay-by-the-minute phone plans a thing of the past? (US)

Trying to find a phone plan that's paid by the minute, not by the month. I want a phone that only charges me when and if I use it -- no recurring monthly fee whatsoever, and no 'inactivity' fees either.

I don't use my phone much at all. Even if it costs $5 per minute, that would still be cheaper for me than even the cheapest monthly plans. And I don't need any data connection at all, ever. Just voice calls and texts.

Such a thing used to be possible, but after searching and searching, I can't find any such thing now. Do they no longer exist?