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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '84a248d451939639d57a54662d12f99e829dd7222517fe2436156d70b1b86e4f' 
  AND token = 'DwOBD+Po68sHDsTKPvVn+Sk5Xz9o3r89QXWNcITLssA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01483

JSON explain

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