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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'dd6f582c2a0d42cae72a1962c004a39ef6581bfd52a0aea8ffc6c86febd1018e' 
  AND token = 'YdU03TV5Su7PHattGSkeDS5tEKYRju5f7mRcrZzfwzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00771

JSON explain

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