Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd0bef8e4264f0790ade8dde36f95a6856eca0d86093a8b66cfd86485c889ed0a' 
  AND token = 'P7eWj9ggy1+gaSQ1ebCgCNKCaQBuu2XttGkWu/yGNP0=' 
  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"
    }
  }
}