Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '318dc4868d26686e9f3520dd80eee23ee9a03a4569fdb2aaf4aaeaf29b570989' 
  AND token = 'xiP8PXMqGvvu8qCZXVX5CaV+kG9w/Q9I/cai/YxyQIg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}