Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e302c95a89bd7eee0b38f6fe5d12383909e091b23ed366ac27b2fe5b4dfa27c' 
  AND token = 'NUSsF1FXdCnYKEUnKzO44AcAaaFttLwAIFUdScvLars=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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