Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '080db80693f433f10e61988d797008e79150604089cfa9dbf46f4bb0b85e9867' 
  AND token = 'qHRDMeBhgSvYYgD5sGdKnlL89vTf9gVCW8FfnmPlLMw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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