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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '05f205ecbfb3078edb9d622cd8cd93eacd4916376268392e76deae5e4b4fbd60' 
  AND token = 'FxIssyKIlFFfd/ohyDIuG7tOmVueFMix2t0W1dBQXOk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00847

JSON explain

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