SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '080b07cc16748830fae1f9ecdefd1754d26ed1ab6beafdf2e3c2265c63596010' 
  AND token = 'Dx0K+/X7fojpQzE2Bt/CJihyoWdij/twfYjVwVrZJK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01163

JSON explain

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