DEMO, Sql Server - rextester

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--Sql Server 2014 Express Edition
--Batches are separated by 'go'

create table table1(
TokenNumber int,
Symbol   varchar(20),
InstType  varchar(20), 
LotSize  int,
TickSize dec(5,2),   
Isin         varchar(20),
ClosePrice int
);

insert into table1 values(22,'ACC     ','EQ',1,0.01,'INE012A01025',0);
insert into table1 values(25,'ADANIENT','EQ',1,0.01,'INE423A01024',0);

create table Table2(
TokenNumber  bigint,
InstType     varchar(20),
Symbol       varchar(20),
ExpiryDate   date,
CMToken      int,
sorted_index int
);

insert into table2 values(46676     ,'FUTSTK','ACC     ','2018-01-25',22,12);
insert into table2 values(48205     ,'FUTSTK','ACC     ','2017-12-28',22, 8);
insert into table2 values(4820546676,'FUTSTK','ACC     ','2017-12-28',22, 3);
insert into table2 values(5361748205,'FUTSTK','ACC     ','2017-11-30',22, 1);
insert into table2 values(53618     ,'FUTSTK','ADANIENT','2017-11-30',25, 3);
insert into table2 values(4820646677,'FUTSTK','ADANIENT','2017-12-28',25, 3);
insert into table2 values(48206     ,'FUTSTK','ADANIENT','2017-12-28',25, 8);
insert into table2 values(46677     ,'FUTSTK','ADANIENT','2018-01-25',25,12);

SELECT TokenNumber
	,Symbol
	,InstType
	,LotSize
	,TickSize
	,Isin
	,ClosePrice
	,Expiry_Date
	,sorted_index
FROM (
	SELECT TokenNumber
		,Symbol
		,InstType
		,LotSize
		,TickSize
		,Isin
		,ClosePrice
		,NULL AS Expiry_Date
		,NULL AS sorted_index
		,TokenNumber AS CMToken
	FROM table1 t1
	
	UNION ALL
	
	SELECT TokenNumber
		,InstType
		,Symbol
		,NULL
		,NULL
		,NULL
		,NULL
		,ExpiryDate
		,row_number() OVER (
			PARTITION BY CMToken ORDER BY TokenNumber
			) - 1 AS sorted_index
		,CMToken
	FROM table2 t2
	) t
ORDER BY CMToken
	,sorted_index

View schema
Execution time: 0,02 sec, rows selected: 10, rows affected: 10, absolute service time: 0,17 sec