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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80eb215d091222f292d0f29e430ebab5d0f4348b1c503615f2c014fa4b8d4a55' 
  AND token = 'WOTZGZPHPYU1l6ydIEdcNRnHGN73a9m0eFVKjULmgSY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

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