SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '27455b4012737c954c936a495397f6e4b78d9f0fa25584cb761a405eda0b6d56' 
  AND token = 'qIbdFAQAMKVD616/AHqpHXep+XuXH2hZKFzjbauKmUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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