Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1dd30a43eaea1e2d45a442135a4e8a792ae3daa2f11d27dd7cc3d92a019e83de' 
  AND token = 'L8497JCJ5fxe425BuiQ4ym1Fsct8n0QIi/Jytbm4aq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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