SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd09b6e49455fb443e78bbcda63579799924ada32815dca38b36ed146bcdd6ae4' 
  AND token = 'AGz7GBZP4HLM3m0TXqt/aRRpkxQ4HUWvK8M+GnsNJBg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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