Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '28d200a2506fafdc542cc189d815fd0a9cf7751ca4b4ab506861ff4891230e95' 
  AND token = '/xlZnDjBmsMUf4BnOH6GtkICmiEtRkt1THejyQ5svhw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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