SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '320aeade262c93ec6f04b37b9be8dbd8cd2bef4fbc0cf7b1474ef8a2791a82ce' 
  AND token = 'G/X6LKQSXhqGif+4D9GMDOlg/aLHW/Z9B5sNzU5pMP8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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