Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49ba44d3c769fb56d97a182a7e1742b01a8a58e5396759ee84f2786831e80784' 
  AND token = '7yRHGa1M8QawOocfbLJGPKhu0RD6movCRjdIXXUKK0Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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