SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '358fa6be19c3b146c078f1b3156513fdcb037d9f2194a1e423d379ae494b5f4b' 
  AND token = 'Jxa87rq21e1u1HVXjY/dhlBnaXVVQp/mBZdZJeSBUCw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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