Select query using IN() and without any sorting

Question

My query

select * from product where productId in(25,36,40,1,50);

Result shows as follows

`productId   ProductName  Qty Price`
-------------------------------------
`1          | namesome  | 5 | 25.00`
`25         | namesome  | 5 | 35.00`
`36         | namesome  | 5 | 35.00`
`40         | namesome  | 5 | 35.00`
`50         | namesome  | 5 | 35.00`

I did not use any order by clause, But its automatically applied order by productId,
I need result with out any sort, as follows

`productId   ProductName  Qty Price`
-------------------------------------
`25        | namesome  | 5 | 25.00`
`36        | namesome  | 5 | 35.00`
`40        | namesome  | 5 | 35.00`
`1         | namesome  | 5 | 35.00`
`50        | namesome  | 5 | 35.00`

How can I achieve this?
Database Engine: MyIsam, Collation: utf8_general_ci, PrimaryKey on productId

Answer 1

select * 
from product 
where productId in(25,36,40,1,50) 
order by find_in_set(productId, '25,36,40,1,50');

See this SQLFiddle