Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95cc6d7de002295434195d7c27f8690c6b7448cb35b49f2d50d7dca2f92d8265' 
  AND token = 'YTnooLKOACZQ3Cd99B3APhAhpLKjpz80cmkUBjVnyaw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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