Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c7c4178a576837af196c802640986d9c91b22eee7e3240e28f2e5283d31a51c0' 
  AND token = 'UEFnij1hLTB8c7jDY0T+F8H5DOTrqoiTNfV7UpzDa6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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