SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0113c3f3c65825358e5b44cf093d70af7d6d0fd5e58d25d9bfbeb1daf30cedd7' 
  AND token = 'ZSh9M3LZZYmNhXGKbv/Q0hg8wpCUS1AaqHYEmtowyKU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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