Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '58d43bbc3dca66c779b7d6fd594135e179f08170020c28e2eb8456bca4dab2c7' 
  AND token = 'lrHbqwOfoBbfdLq5CfrrXPHKVPut9dsgJnKXBO8Ww3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00792

JSON explain

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