Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4da9d4887ee17483a637393a476e3daafadbff50081ab947311b0dfc2d5d5f3e' 
  AND token = '12ydQ9AxkUjxEyqGvlylKfsZc+Fj/R1SoZE4XdekNZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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