Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e115698e52e97ad9e9ce923496d0964b76f80e897caf5878e99419f1e8fd292' 
  AND token = 'HbVP2/WXf+PR9zH4bLFWEysFTW+bL5it09kW7POeVUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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