Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fbb86e6f4b200c95c9e68bdf726111016f060b513a19c36d1c131ff700e334f' 
  AND token = 'CVZ3kjc7OJlvJfeuxM0itwb843xoZlmQ5430kXDjfiQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}