Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5d03095dd9c106aecb483bb19deb3686d45ef29c46be5c2bb34472813059300' 
  AND token = 'ttUuA19Fcrfh6qXYHGoLuW56sqiX7vCsjeYPT41+6I0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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