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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'e5e021f83c417c46f0b6bdae39c257de58ee4d2c9f1277ce89edb6a9c9a3d595' 
  AND token = 'Ckah9A+rpCmfZBMhIa/pS767LmXipDDPW2JukbEG3a0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00775

JSON explain

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