Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99955e1691fd542ed06afbd9c29da575e2e2e2ecc3cbf1cb0e4a10d634d3c558' 
  AND token = '75pLpBHqHB9tPmltWeRsqknd3hLU4ZfG9eW9C8PlLXQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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