Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7c28fcb7b9e23bc4f8b83e8ae17c45769e79a193836498de7e1043820df805df' 
  AND token = 'ihSE9U/pcEiKtHSPNTu78qiMynKC7i2FfuVRL3MKc9Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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