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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01524133ea95e4f9f01fddc202ac012af075d34be685eb1022ddc6ad6dea9a29' 
  AND token = 'pnszb7U22XuFABRHlwnyQcLYPXTyPvxVu9vGQGf9g5I=' 
  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