Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '8a6497a8a1db4833b69cbd55a6d409d13d94a006f32e9fe74b010e36bd985123' 
  AND token = 'szQl7z/EWceOu5y373COk7TonN80zQhMeqFLhqxUIas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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