Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'a2e390b98b2a21ac63b3ab850913afa31134f808c9117b72a6c7b43e51c32256' 
  AND token = 'OkFGtATktiMxj9tvps0OT1AU/VpGW4PA9kk1N1sEH0o=' 
  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"
    }
  }
}