Keys on blue lanyard with pink music-note keychain

I found a set of keys this morning around 9:15am in the parking lot behind the Main Street Café on Main Street in downtown Macomb, IL. There's a bright blue nylon lanyard with a silver carabiner and a pink enamel music-note keychain, plus a few house and car keys. One house key has a dented brass head, and there's a small sticker that says 'Mason' on the fob. I figured someone would be stressed about losing their keys, so I’m hoping to return them to their owner.