Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23e8c1e772c7b3a7098e6036ea025f05c9861ba87ed6b222754700ee3f1c6699' 
  AND token = 'X7C6/GTWMZah0F5FwIv4xL9GkrQpgys1Cc7bKhzNCWc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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