Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd79f64d2871e9e472efd1486f696aae5e389cec61e5f5c0180216789d764f3c9' 
  AND token = 'u9iwDNhe24//sY907CoYubZQz91/LJpwRW5jW0VBOxw=' 
  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"
    }
  }
}