SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f3a1053ec312d592f810ba102a3b47d08f990ee6ee0702ea159117dc1cca230' 
  AND token = 'HgqxosGaq/u2KPeylVU8No9F4dcBxMoJr+Z+QPySmg0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

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