Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f25929d9e50c81a8b13a826d6dea5d66d9528e10fcdf4312ae48897c7c78e797' 
  AND token = 'KtAdyXz+q3UKgt3V000IkTB1IiNURq8MzAhOwRzgRUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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