Krabi's main provincial bus terminal is inland at Ban Talat Kao, outside the central riverside area. Check that your ticket names this terminal before planning the last part of the journey.
The formal name is Krabi Provincial Passenger Bus Terminal. A booking may shorten that to Krabi Bus Terminal or refer to Ban Talat Kao. Keep the operator name and arrival point with the ticket: a bus terminal, airport and ferry pier are separate places.
The terminal sits by the Highway 4 corridor at Ban Talat Kao, inland from Krabi Town. It is a road-transport hub rather than a waterfront arrival point, so do not assume you can walk from the bus directly to a pier or beach.
Krabi Town, Ao Nang, the airport and the province's piers require separate onward transport. Railay has no road access, so a bus arrival must be followed by a transfer to the appropriate boat departure point. Confirm that next leg with your accommodation or transport operator, especially for an evening arrival.