Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '41e1b76f593a933933088a4ca477ab2633236eddd814f912acf566d19aeba3ff' 
  AND token = '3XIuHKi4EW+5XqiqpG7oNncTblSsPgT0i16tZKjNKwc=' 
  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"
    }
  }
}