SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'fc524f7dfc2803163c3be5fd6c54a5cb566e187eee6b235ad4a8cf4100cb5dd3' 
  AND token = 'wb1esdur2KTWP/9hZMoh9LzYeJpnghp+UD6rfOvjw5o=' 
  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"
    }
  }
}