Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0712a0c2eabea617337ed5cbc613fc69b1658cbdc57947b563d209cdc2d5a312' 
  AND token = '7UAAOrNV4uMGDN136+wdbQw3Zrjij8C61nkFKM+wj8g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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