Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3570833f4f39d94b6bf79813901aa5196272045c831fa87ad4f321969c573da5' 
  AND token = 'yvpDaV6kwK8ZH3apPUw79pPLHn+SRaF5RvpuMrgXFrw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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