Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '495fcf6ed6c33fa80994e45a2659eeae93cdbdddb1840ff0df089b4d52363bad' 
  AND token = 'l190HwPPk700fA0pEVtoUjg8XpwS9/14BKpme2NH2sw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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