SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ba70e0c638f8a5d8323b87472b2854fb61171deee38cb7631892f2e84d4bd5ab' 
  AND token = 'gkVLcUuV6zbc5jxA3BwWXfeXYotJeyO8wKrpgztPUHc=' 
  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"
    }
  }
}