Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d19c321e4e5b4dc5bae7a5bf12446fdf07a10d5204e03926f192a762b380e3d' 
  AND token = 'Ch+vyW2uZS1czShNaj3YC7EyLygt3LETiiHBrBrb7ys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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