Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5ec57a0f25fe1c6e39330fc044d3aaa8cabee3e59247d5c02d1ba99a9ce9a8fc' 
  AND token = 'uaH3vblwNZZQt60saCrI9Tq86otoXOneM7n3hvgh2uE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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