I can't find out the reason of the repetition of this query ? This make my site slow.

I can't also trace this query in my code.

QUERY1 :- (@1 nvarchar(88),@0 datetime2(7))UPDATE [dbo].[Sessions] SET [Expires] = @0 WHERE ([SessionId] = @1)

QUERY2 :- (@p0 nvarchar(4000))SELECT TOP (2) 
    [Extent1].[SessionId] AS [SessionId], 
    [Extent1].[Created] AS [Created], 
    [Extent1].[Expires] AS [Expires], 
    [Extent1].[LockDate] AS [LockDate], 
    [Extent1].[LockCookie] AS [LockCookie], 
    [Extent1].[Locked] AS [Locked], 
    [Extent1].[SessionItem] AS [SessionItem], 
    [Extent1].[Flags] AS [Flags], 
    [Extent1].[Timeout] AS [Timeout]
    FROM [dbo].[Sessions] AS [Extent1]
    WHERE [Extent1].[SessionId] = @p0