SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41fbb9078f4212e620cb18a5f8779aa724b84265772676f942297088438735e2' 
  AND token = 'wmd75GS4/suz3M3hqcGFxhmZNK8SDyv4vLRFfv8I+o4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

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