Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7adb34439552a1dbf396886c0eb733cfb6db883fa49ca22bee993b13431ba888' 
  AND token = 'HLegfIQYyTh1B6pO7IwLVtU274eiY9e5+datm2dNOIo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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