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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82bbe1543136b3c78f5ba66d054cb2181b1d3be20a0f9cc9a5f39939d09f40f8' 
  AND token = 'IXybHH/RkVGZ8X+0WRW95onkCRSXGHSFBA+555x+BX8=' 
  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