Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '062cfa07b42ebc098c03280c56d61dbdf4a668c6e956644249697446cebbe542' 
  AND token = 'XxRiOwwU8D74TYadkh44CDcK90UaAEt8YDDnoZKCLtk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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