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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c9f85932d690f59fba768e71ace4dd4b2ef2c66379be50386e4ed10824f27953' 
  AND token = '4yNxa6R6/AgB09PsAPYLU75HHyiXU72QtT95EA1scuQ=' 
  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"
    }
  }
}