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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7193391de6cb8f367db80e1b46432ae83b152eb2488a8ad01b45d73b48acca6f' 
  AND token = 'nqfpRlcTAyXyk5OZ1oTPHTM7Sst1Kf3u/BnnqnLkBhY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

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