SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa578a7c382a3189f4b3405ff90fccf4666795104768b8e667802322dc514a64' 
  AND token = 'ewnNTMwH6MBWPu0uF3dLfpJRc8xcAEAuGpIoso+EKzI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

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