SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '077dc0395c862ec12669b7fec5ba798bb389348aeab282832598f9e35ed10c2d' 
  AND token = 'hKv7saJ4jzyCfKghlwGu/5yVuabaCkHy14dRP5I7Hsw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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