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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '058d385f4fe689b7682968d66b55352f8ac156f1bee0159bdaf23cbb104b1c6f' 
  AND token = 'JqpXNgKwjT/6pD4ox1p3bZo+DVebT7WbzJssx9yJ4Xo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00876

JSON explain

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