Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91205ba9371d3ce41eb8b5512255aaad4ca0f2d94608e606600487059214db04' 
  AND token = 'MLcpcuO5MaI7Htomir605o1NmlvL2QEbS9qTfeJq7QU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}