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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1a9dfad191d3d72626217e69e4e578a52416ccb437c2bacd79c90d8fd6b7e10' 
  AND token = 'FesnZFOYpAzK2emCKxdTVAg3G9Y1KstXmImZEOzomhw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

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