SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5617e80fa295a1c55cba600e27f2b87bb3d8beecc566e13bb26dcc4274ed231' 
  AND token = 'IGQ/+jCCImmTRcCj+wsvfcs6VLtCF1JGHRfnuieluUc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

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