There is a few factors you should consider in that case.
Keywords in URLs are overrated and don't really have much impact on page ranking.
Best practice always keep URLs as short and simple as possible.
It is usually a good practice to omit the categories in URL. Because If you decided to change the name of the category for example, then you would also have to redirect all pages with the category in URL. So I always prefer /product before /category/product since its more robust.