Unicorns are basically horned horses... physically at least.
Horses are perissodactyls... odd-toed ungulates. The hoof that touches the ground is a single digit, equivalent to our middle finger.
Those tracks are blatantly artodactyl tracks... i.e. even-toed ungulate. Note the two separate halves to the print.
i.e. That isn't a fuckin unicorn track.
Some deer do leave tracks sorta like that. Moose tracks are kinda like that.