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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0deeb8b49645841c278cdb9cccc2886c56138a334cf76f44dee9e167371d2819' 
  AND token = '2H8fimMc9bA6S614Kfc8PzNR2MqeLFfUFFScnAxtaEc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

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