Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '4bae1f7873e32fb975f1acb84d7725e8e15ae230f764e416cfa5c93d55407443' 
  AND token = 'MbGj4Ifmk9hNKPM6frSrPm4C7hlLKk38IGBr8bduLno=' 
  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"
    }
  }
}