SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e9f63919413140dd58113af41b596be23c5cf8cee2bf0b41c273411af87f39b3' 
  AND token = 'HYnkKSnKoVoNvsmtihpYhVxOnHOaQQoVWFAAKRW9L+w=' 
  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"
    }
  }
}