Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0375eabc3b7e42e2ac98826d564f9b13f49388307976637ca7742acf3ffd87d8' 
  AND token = '4sacEEK6vv73nb5FVwNAwC5ujp2bixWEzfC/9z6tgYY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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