Tollbooth

You touch a key from your pocket to a non-magical entryway (doors, cave openings, etc.) up to 10 feet in width. For up to 1 hour, creatures may not pass through the entryway unless they possess one of the tokens used as a component to cast the spell. Up to 12 tokens can be enchanted when the spell is cast. Any creature that attempts to physically pass through the entryway is blocked by an invisible force. Non-creature entities such as projectiles, gases, natural elements, and the like can still pass through the doorway. 

The spell only protects the physical space of the enchanted entryway. Destruction to supporting walls, ceilings, and the like can allow creatures to pass around the entryway. 

When you cast this spell using a spell slot of 3rd level or higher, the maximum size of the entryway increases by 5 feet, enchants an additional 12 tokens, and lasts for an additional hour per level above 2nd.