Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'b0f758a6313fd2f382436b9328b6f87e8f62598159dbe852aac62728c9849a0b' 
  AND token = 'OqnxMn5xZStPs2TWwGJVBlXStrp7PzBIflkytXCeupE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01130

JSON explain

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