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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '8117f5a5d3ee2d18a335158d261d0383f79a72926235c0137e7e623935c81593' 
  AND token = 'SpYqLnnXMBJPD777TFYnCOzaK06dBQ9ujB0XHqxcM3Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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