Blue lanyard keys with red carabiner

I lost my keys yesterday around 3pm near the Boone County Courthouse at Broadway and 9th in downtown Columbia. They're on a bright blue nylon lanyard with a red carabiner. There are about five keys—home, mailbox, and a bike-lock key—with a small yellow enamel heart sticker on one key and a tiny nick in another blade. A black USB drive dangles from the ring, and the lanyard is a bit frayed near the loop. This is the only set I carry, and I really need them back to get into my apartment and ride my bike to work today.