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1)I used to play football.

The above means the person played in the past, not any longer.

2)I used to eat hot food.
By saying the second sentence what I am telling you is even now I eat hot food.

So the first sentence evinces a past event whereas the second sentence evinces a past and present event.

This is strange. What do you think?

If, even today, you are in the practice of eating hot food, you would use the second sentence, wouldn't you? Of course, you could say either I can eat hot food or I eat hot food. Here I am interested in the use of the word 'used' in similar context.
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'I used to' It is still a past event, if you used to eat hot food, it mean you do not any more, the same as your football example,

I used to eat hot food...but I burnt my mouth on some soup and that put me off.

I used to eat hot food...but now my cooker is broken.

I used to eat hot food...now I only eat ice cream.

In the present you do need to say: I eat hot food, I like eating hot food, I am able to eat hot food, I can eat hot food, I only eat hot food, and so on.

'I am used to' is a different phrase altogether. It doesn't have anything to do with the past. It means you are accustomed toand is used with the 'ing' tense of the verb. So,

I used to eat hot food - in the past I ate hot food but I do not do so now.
I am used to eating hot food - I am accustomed to hot food.

I used to work in an office - in the past I worked in an office but I do not anymore.
I am used to working in an office - I am accustomed to working in an office.

Your phrase 'I am used to eat hot food' is not correct and is not easy to understand. If you knew the correct form was 'I am used to eating' why didn't you put that instead of 'I used to eat' in your original post? Then we would have understood you straight away.
Comments  
I would take sentence (2) to mean you ate hot food in the past but no longer do so.

What is it about the 2nd sentence that leads you to infer a present event?

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PoorRichard

That is my question too. So it would be incorrect to say I used to eat hot food tell the others that you even today eat hot food.

I know it would be 100% correct to say 'I am used to eating hot food'. This means, I believe, It was a habit for me to eat hot food in the past and even today it is very common to me to eat hot food.
 nona the brit's reply was promoted to an answer.
Nona, thanks for the reply.

It is obvious that you can't say 'I am used to eat hot food'. I made a stupid mistake.
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Andrei, in your previous post you said:

"I know it would be 100% correct to say 'I am used to eating hot food'."

You were 100% correct to say this. The context you gave was also correct.