It is available over-the-counter (OTC) at almost all locations and through the CVS website. Quick Facts for Buying Plan B at CVS

It is typically located in the family planning or personal intimacy aisle (near condoms). If you don’t see it, it may be kept in a locked security box on the shelf or behind the pharmacy counter to prevent theft—you can simply ask a staff member to get it for you.

Select CVS locations allow you to purchase Plan B through the pharmacy drive-thru for added privacy and convenience. Cost and Saving Options Plan B: Cost, Buying It, and How to Use It - Healthline

You do not need a prescription, and there are no age or gender requirements to buy it.