Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4b2e8033c4d285d9ed013642307f83b5a501790399ecddb9567fe5d6f734504b' 
  AND token = 'b0GoOdOZVvdowpKu0oRW+Ws+rA4eHo324vpbSf0j1z4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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