Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0b5a7bea0093a2f81948227435df93b284748d1d738feae170ad0b315ad2b2ee' 
  AND token = 'FYzds2KcOveewRZkkTNy4KhXMOBb43EjEQxn/q1zipc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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