Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '0738a7c9cfb8541e9bc6dc7add2b48b16879699fc83a1d1891dff638966b692f' 
  AND token = '7Q1eOLxQcKXfU41FVvE2yPRzEps36hPkImIFnnQC2E0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}