Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '552f2153f01b680749448e6af5a3820fb120de5c9e9039cd179a78816934c681' 
  AND token = '+n6cl7Ho6nzegxyVVO3DRF9pRS9a3g7sLEcbJZgnenU=' 
  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"
    }
  }
}