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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '57353e61462cae515ffc09f0bdec2cd13b66e3b40d7857e4c908f8f5945ef7e4' 
  AND token = '1GWPGMdNoK9PbQ+wA2TBmGAlKvFelENknoJSxs2PdGo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00744

JSON explain

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