Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4805cb074187de972b24bd0b01f8992cd84099803101f439af06d6e8944a2580' 
  AND token = 'oOAZcNGC62/IOpUaYTZslEN0ErR2yxzRg7zJqakxdg4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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