Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd8349a749e9f346b3478c58f1911ff6f7f6c4be31aca08030fbe8c54dc01722' 
  AND token = 'FmmEXgLa3LV02TXmso1JhZtG7n4VLkrHe71LjZGVlbo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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