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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b059a3caad0b6fd2ad3f43bf5bec6825eaa5346faee41d6593256b37bfe7e06' 
  AND token = 'kb693yHADeGzmaGnyAAulPYeqFwb9jP9SYm0tfz4gTo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

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