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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80233d44c8a8112f3ba975b1e9bc95def89c1fe11eb58df680507d34c97e211c' 
  AND token = 'dRfuOq3raYJuvU8KhmMMN5he7br40iJYahSogdy01YY=' 
  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