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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eac26ade7d6bebb0ae96b74cc8116b0d7d54ceae4dade81f6680b70c595d0fb1' 
  AND token = 'MMAhSNc1NPs3sngYRywAjn4AH9OJFW7w8modqMS7OHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

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