Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84519db3c54c37e10abb06edaa7f6060eb4f0fb7be5d2c971f7d163b48db1b63' 
  AND token = '5HlOxJCwZEbyniczO4UfhzcbjleucrToTZqIA+RegwM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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