SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '384381449d5233406f6b7ddfc5469813858311d59912d264f9cd80f4e157b6cd' 
  AND token = 'uCR1JSK0+ghy0aZXQBjkpmCBhR1YhXksO/hjCbD/RB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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