SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '773ada4600f8dd3e2bc068d279b31d61567b259affc06c9b0830ed21dab20c6a' 
  AND token = 'EoXe0RRRsEkeTj/3sdw2VQNjTpmWqRBU16/kRJLo0EU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

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