Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '268a501986115829caec1da3b91b90a851907ae9c58010dbf348d9d3f8852e2f' 
  AND token = 'S33pZapX26fapY6srtf4ZKCeg4hvLMmc+LxHnHEvFsY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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