Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '03ef76febdcb6591bcd52b356fd83182c877dfa969b7fb8d27751f80d33320fc' 
  AND token = '5smgw262mGPzqjXzkeAx6JBfGhme1sPqBwNPAMD993w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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