Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4197efd8787acf63cd8e1bfcf76d50f24e1b89084e383dbfc28ab69ec95f7802' 
  AND token = '57SFkDF83Olq2GzlND2Ma7w8z+JPz5XbDhupoaxs4Ps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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