Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3fb90d1372db76ee2d26611ebd0769a5493e1b38478b0e88e65917a497112083' 
  AND token = 'P+zpcaSPcfydGOYXUy6RHKBo5fXss3xZyiD86OPPDbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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