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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '98d532eaf5403af0deb4e193d8342ef0261f34c14cbf00a4ff5fcdae4822f0da' 
  AND token = 'k/OlmJ6+X3rF+jLk18Tg/M4O5xydCVzGnETageeTvxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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