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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'abc3e33a01917f0bf6e69ec11a5fa61e8251787e809213f1a080f256d6a0b75b' 
  AND token = 'yutv86w9Oki77leStwMGOLJGlWeUtrCnraP/XOtlVIw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01511

JSON explain

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