The entirety of the redirect URLs are contained within the unicode at the end of the short link (https://masked.link/#ؘ֒֘ިܼี࣮֔ܲެׁׂ֔֕݃ࣳัื֢֜ࣿ֟ޭֽؘܑܾ݈֦݀ܺ). No database, no worries!