Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba3b5d0c72d1a2c90be2077845792f5ad0da0c8b0a8c803f9cb3f48c97818942' 
  AND token = 'IhrsMOZZGDAlOHpJFfvFk4g9tfMQr1XddtZCtVcdmiU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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