SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c4daf7cfecf1677a27152a71996bc99ff6862930395dd4bff249f01fe12a5653' 
  AND token = 'qNZXkwS2vQmuOUz33o2YydGmEBpQ4pGlYeF5sFToXVc=' 
  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"
    }
  }
}