Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '165e0764cbd7eace1d3c170738d4af21d21517ba8b5b3bce81e33ab813b6f084' 
  AND token = 'QiW8Xjs7Ezc8YlMbKI4asKw74lHBmfVFjvlNuBs4Neo=' 
  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"
    }
  }
}