Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dcd58e25d350d93b2981a8b1e5b64ac1169b1ee4a03953e2b843a90643c8bbc2' 
  AND token = '+9YgYSyFwQkfb0GmdAWnIFYfRfWw3KSWyhlNE0zo5II=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}