I used Waterlox on a desk I made a number of years ago. I used that desk extensively for a number of years and had no major scratches or dings. Pretty durable finish. I used their classic version which is oil based but they have a water based formula as well.

Edit: Disregard this comment, I didn’t see the part where you mentioned wanting to put it on over the Minwax finish. I don’t know how it will work in that application.

I use Amazon for research and then purchase the product for about $5-$10 more on other websites, ideally the company selling on a Amazon has their own website. I’d rather pay a little more than give a dime to Jeff Bezos.