SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '2372502352b76e87e62ece1a3d9720cdee90b38a74f9651c92f0aa41ad3c7b5b' 
  AND token = 'VLRpeFbNpC8fZMFWBCtXHeUz+u4/NYdvzwXa26ssplM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}