That rack is designed for light touring on a road bike. The pannier is especially narrow for improved aerodynamics and the top-plate is minimal.
It is totally compatible with modern, locking QR mounts like Ortleib and Rixen & Kaul. If you need a hook/elastic attachment at the bottom, you may need to add a bolt-on thing with a hook hole.
If you don't yet have panniers, then get a modern locking QR system.