We have used both Rhino matt and Mflor, which are alternatives to karndean and as @mitch says are fully recomended and last for years. We had them put down as a full sheet (like a carpet) rather than tiles though. One thing worth mentioning is LV’s aren’t cheap and need to be laid properly preferably by trained fitter.
Another option that would give your legs a bit of cushioning would be waterproof carpet. Though you would have to hoover it rather than mop it 🙂