SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a360940da7f82706a1e08770e819869b302980052b0b096ffd662d4cba54fe0f' 
  AND token = '/igZCdKnjiOL6rg0YmLRMl++9Wn/JqWQtblQG8DnIlk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

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