SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '429e1d8c696614de4b6f213527f4f616627761613c82721b1207324a3e8b64a5' 
  AND token = 'NJz/fbmnpxUwO45PG/LlZiohhzd3zYB2wrNcaSQZ8rw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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