Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fdcc1783cc826797e8e677534395a0092eb05e9eef4a0cfed35d018403dd999' 
  AND token = 'RRvRbyfPCEEh5p2M7iXz7jMrhVN1QDB8GamoPWykgIw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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