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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ffca43dea8f26cfc8372a9507de1f2aaf72f997f7d81353652d35278a48dd8df' 
  AND token = 'lsXImK161y6PEML/HCVKVyKRh4fQfdPw9+fJEur8KPI=' 
  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"
    }
  }
}