Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb8667382c99f53210f82e827174a728536017918ee271105259ff216485467f' 
  AND token = 'ba9ZWUx+u1EaT5xd6xjToQbH12ypCC2JF+WlwB2173E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00102

JSON explain

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