Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f654cb1380731ac7494b541f39af076287e7fa2fa7af49a9f903497c873f5b3f' 
  AND token = 'VqhNsBkxL/VBWJckvWxvChKAKyGe3XCrG5LbiMQbE04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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