SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b85eac7b6dac049fcc84297fb0b378de880a47b9cd054814965a69d8f0fc64e' 
  AND token = 'ceEk4ZveF/xV2h8R9BEZce7Eo9reQYVOTTQiYXNa5sk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

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