Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddd5d716c2ff678efe0880b8419d9f5441e7e4a01c49f12c818cb627b4b946bd' 
  AND token = 'FdHIlWzBmyC/97Wlt8ApKQx4HGbRPSj5SjPwLSrh28M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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