Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47746b00a91f7fd553fc40cb8a7f528911760526bf0dd91a72f108dd93f40b70' 
  AND token = 'QcwkuQS1P0QOkZ0caG7UMLAiioVu0FVoe9YfQG/6YSM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00066

JSON explain

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