SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d47b6ca9570f95eb1c3ee2e437be23e81886d86df2ccbf93da94bd736c1d7d2' 
  AND token = 'gIhf9wYUXpjGepgsREqFDsU46Rk+6mqzfXZYi/8U5gI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

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