IF OBJECT_ID('tempdb..#MyTable') IS NOT NULL
DROP TABLE #MyTable

SELECT *
INTO   #MyTable
FROM   (
		SELECT '000000002' AS col1, 'Ч1.2020.16.01' AS col2, '2020-04-15 00:00:00.000' AS col3
		UNION
		SELECT '000000002' AS col1, 'Ч1.2020.17.01' AS col2, '2020-04-22 00:00:00.000' AS col3
	   ) q

-- SELECT * FROM [#MyTable]

DECLARE	 @col1	 VARCHAR(100),
		 @col2	 VARCHAR(100),
		 @col3	 DATETIME

DECLARE MyCursor CURSOR FOR

SELECT	 DISTINCT
		 col1,
		 col2,
		 MIN(col3) AS col3
FROM	 [#MyTable]
GROUP BY col1,
		 col2
ORDER BY col3 ASC

OPEN MyCursor

FETCH NEXT FROM MyCursor
INTO  @col1, @col2, @col3

WHILE @@FETCH_STATUS = 0

BEGIN

EXEC [dbo].[SomeSP] @col1, @col2, @col3

FETCH NEXT FROM MyCursor
INTO  @col1, @col2, @col3

END
CLOSE		MyCursor
DEALLOCATE	MyCursor