Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8aec28e27c28dae2bdf12ee2f621ed6743b396a113bde565c3c947d2f4bdf284' 
  AND token = '4mIQmyZrIx3Qs5aglBccmVKGF6li3607bjhehz426Z0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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