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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '60d7e800ab3d30075d5bd1367611818ea1d6720117c5b398193e61f85b0bb50f' 
  AND token = 'zk1XEBqqa83hxRGpNypqt5Rwm6kWO/z65CnFc3nXWh0=' 
  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"
    }
  }
}