SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb441e4d6ac718d2ed479fbc19bb8358fcdedf2d0fd5a8cf5f093b84e1fa5026' 
  AND token = 'ILgFo1YJT1cWRlwnaUvMGJXGkDj7V2zFZQAt3x8+nmE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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