Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '8831a006f96167ff6a963608f27292d02fbe682d0faf7fb774d538510f2fb4d1' 
  AND token = 'q4k/j3IYGxqVHiuQh8fVj1tqd5g68RArwgoNSk5U5O4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00776

JSON explain

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