Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f142c278db31a03737097186e6bd5b3c6741e0971ccc3207f2fb70ebe1d8e974' 
  AND token = 'FMlnRs0pXxXsygjVl59YMFLiCDOGxwkXmWBtcYN+MkE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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