SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d1041257fff2130c30b9d6326412d17dd8f52e0f6321aaab2caede3937b33b6' 
  AND token = 'ZUduAeMkPK6SI4PzPmZZ+1HNFFTyExArwyU8OxuooRw=' 
  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