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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '13c48734d6ec104bb180fc05e82d28f2929455997c0368e752c54d809d23a730' 
  AND token = 'nyY1UthUn/zFKs4Egj0LMnZfKcCck54C5V5ze4d6pSo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01488

JSON explain

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