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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d0ba57adcbe96ef079dfbe815fad610c52dbe74f9248d170d90a0dcb248f267' 
  AND token = 'NBnweTf9CbyGEdR2UYSS9kRXQpB369rXpzGz3XKTwQA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

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