SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1dc9ab864a9dd3265d63feb31c10a7c37259998b218339a0bb40826fc16feab7' 
  AND token = 'KTj7d/jyKYO/rhWXQnOadBMCEyzzmPi0EvLCyXqFQ3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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