No man, you have 90 days to start your visa before it expire. Then 60 days as a tourist visa. I've got one. Info from the thai embassy (Spaniards and citizens of countries that are in the Tourist Visa Exemption Program can stay in Thailand for tourist purposes up to 30 days without a visa as long as they can show the ticket to leave the country within 30 days. Otherwise, they must apply for a tourist visa. This visa is valid for 90 days from its issue. And it allows an uninterrupted stay of 60 days from the date of entry into the country with the possibility of extending another 30 days at the Immigration office in Thailand. When you leave the country, the visa is no longer valid.)
Yes, I did it, but I couldn't sleep. 12h, better flight to Nakhon phanon & then can go Thakek in Laos or Mukdahan by bus. When you book the flight you can book directly to Mukdahan