Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5347097704b62679a109f3ddd98182f589e9122647472b17da835210c7619cc2' 
  AND token = 'heGwJbeEaPwxjR68qAjciO/S3hNMpetc2WgnLShJZSU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}