SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0694e41cb5313c29ab5aa9614b924a82e127066e6f0c93d462bd1ec81cd57446' 
  AND token = 'Opo3iSWxV8ZD7gXjgGYbytr4MUBYJrZgIezRzBFRdwQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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