Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ec0161c4e0151999da28b7168f2718f6839dbfede31def16aa8254e6b17f0ff5' 
  AND token = 'QV7SzrCvrqK9b4834jc1s0wD7MY5GUwlmjg7mlM6wr0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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