Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84001f9e3bb83db8a377b0eaff2b71cceb88eaecdd5aae5b3d104d693f39fb8e' 
  AND token = 'tbbvDpZ5bdNM04d7FV7jCetphItylQ8pL5zp1BfiL8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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