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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ee3e98fed0d40cc2471a5cacb2c235005b10db4c786ec5ab746d01584d7e312' 
  AND token = 'TA1DWVdWcdV0Zof5QHPdKZEX/Jw+yOC1tdXP380dEpE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

Explain
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE								Impossible WHERE noticed after reading const tables