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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '8c958bcae80eacbbac98d42b8bae91814159870f9e0cac55f1f21dd7bb08060d' 
  AND token = 'XMasxmSKVcdRvKssNGPy9jaUc8t68ROx7Bj++g/PXak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01462

JSON explain

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