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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d3dd1dea1da4ef7141c13a99b8dca75736794d6df652638d5313720a790016d' 
  AND token = 's0b9QHvCZR16io4gTeu7DoWNH7URdZxWINoIkd1LOtc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

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